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白藜芦醇在银电极上的吸附伏安行为及其应用

董社英;郑建斌;宁艳利;高鸿

  Adsorptive voltammetric behavior of resveratrol at a silver electrode was investigated. And based on this, a linear scan voltammetry for determination of resveratrol had been found. The adsorption corresponded to the Langmuir type isotherm curve, and the free energy of adsorption was caculated to be -46.21 kJ/mol at 298 K. The electrochemical parameters such as charge transfer coefficient α and standard electron transfer rate constant k_s were estimated. In 0.2 mol/L KNO_3+1.2×10-4 mol/L KCl solution, resveratrol can give a sensitive anode peak at potential about 0.29 V(vs. SCE). The linear range between the peak current and the concentration of resveratrol is 2.0×10-9 to 1.0×10-8 mol/L and 1.0×10-8 to 9.0×10-8 mol/L, respectively. The detection limit is 4.0×10-10mol/L. The method had been applied to the determination of resveratrol in wine.……   
[关键词]:线性扫描吸附伏安法;白藜芦醇;银电极
[文献类型]:期刊
[文献出处]: 《高等学校化学学报2003年03期
[格式]:PDF原版; EPUB自适应版(需下载客户端)